Portland cement with high strength

This type of cement has higher compressive strength than the other type of cement produced in the company and is being distributed in class 425 and 525.

28 day strength in types 1-425 and 1-525 equals 425 kg/cm2 and 525 kg/cm2, respectively.

Technical Specifications

$Portland Cement Type 1-425
*Chemical Analysis
Loss on Ignition
%1.60
Max=3
SiO2
%21.60
-
Al2O3
%5.00
-
Fe2O3
%3.57
-
CaO
%64.05
-
MgO
%2.00
Max = 5
SO3
%2.10
Max =3
Cl
%0.02
-
Insoluble Residue
%0.60
Max = 0.75
Free CaO
%1.50
-
Alkalies(Na2O%+0.658 K2O%)
%1.0
-
C3S
%51.9
-
C2S
%22.8
-
C3A
%7.2
-
C4AF
%10.9
-
*Physical Tests
Fineness/Blaine
(cm2/g)3260
Min = 2800
Fineness/Residue On Sieve 90µ
%1.2
-
Setting Time/Initial
Minute140
Min = 45
Setting Time/Final
Hour 3
Max = 6
Compressive Strength/2 Days
Kg/cm2 180
Min=100
Compressive Strength/7 Days
-
-
Compressive Strength/28 Days
Kg/cm2 440
Min=425
Soundness/Autoclave Expansion
%0.06
Max=0.8
$Portland Cement Type 1-525
*Chemical Analysis
Loss on Ignition
%1.3
Max = 3
SiO2
%20.9
-
Al2O3
%3.5
-
Fe2O3
%4.0
-
CaO
%62.1
-
MgO
%2.0
Max =5
SO3
%2.0
Max = 3
Cl
%0.03
-
Insoluble Residue
%0.6
Max = 0.75
Free CaO
%0.9
-
Alkalies(Na2O%+0.658 K2O%)
%0.7
-
C3S
%59.0
-
C2S
%15.4
-
C3A
%2.5
-
C4AF
%12.2
-
*Physical Tests
Fineness Blaine
(cm2/g) 3600
Min = 2800
Fineness Residue On Sieve 90µ
%1.2
-
Setting Time/Initial
Minute 160
Min = 45
Setting Time/Final
Hour 3:30
Max = 6
Compressive Strength/2 Days
Kg/cm2 240
Min=200
Compressive Strength/7 Days
-
-
Compressive Strength/28 Days
Kg/cm2 535
Min=525
Soundness/Autoclave Expansion
%0.07
Max=0.8